Train engine



FIG. 1 is a perspective view of a train engine showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a rear elevational view thereof.

The bottom of the train engine is unornamented. 

The ornamental design for a train engine, as shown and described. 